Visual timing abilities of a harbour seal (Phoca vitulina) and a South African fur seal (Arctocephalus pusillus pusillus) for sub- and supra-second time intervals
نویسندگان
چکیده
منابع مشابه
Brightness discrimination in the South African fur seal (Arctocephalus pusillus)
Underwater, the contrast between object and background is much larger reduced with increasing distance between object and observer than in air. For marine predators, such as pinnipeds, it would therefore be advantageous to possess a high sensitivity for brightness differences, since this would increase the distance at which prey can be detected visually. Few studies have examined the brightness...
متن کاملThe endocrine pancreas of the Cape fur seal, Arctocephalus pusillus (Schreber, 1776): an immunocytochemical study.
The indirect peroxidase method was employed to study the endocrine pancreas of the Cape fur seal. Immunoreactivity to insulin was confined to the cores of the islets and the insulin cells were more abundant than the other endocrine cell types, which occurred mainly in the mantles of the islets. Of these, glucagon cells were the most numerous, followed by somatostatin and pancreatic polypeptide ...
متن کاملMeticillin-resistant Staphylococcus aureus in a harbour seal (Phoca vitulina).
METICILLIN-resistant Staphylococcus aureus (MRSA) is an important zoonosis that has increased in prevalence over the past decade, with up to 2 per cent of human beings acting as carriers, posing a risk to incontact animals (Tattevin and others 2009, Loeffler and Lloyd 2010, Couto and others 2011). Pulsed-field gel electrophoresis has been used to separate MRSA strains into community-associated ...
متن کاملblubber of Cape fur seals Arctocephalus pusillus pusillus off the Eastern Cape coast of South Africa
The concentration of heavy metals (Cd, Cu, Pb, Ni and Zn) and organochlorine contaminants (PCBs, DDT, DDE and DDD) in the blubber of 12 adult male Cape fur seals, Arctocephalus pusillus pusillus, inadvertently caught in trawl nets off the Eastern Cape coast of South Africa during commercial fishing operations between May 1993 and October 1994, was investigated. The median and range of concentra...
متن کاملRelative immunocompetence of the newborn harbour seal, Phoca vitulina.
The immune system of many mammalian species is not fully developed at birth, with newborns obtaining temporary immunological protection from maternal antibodies. Little is known of the immune system of the harbour seal, and developmental aspects of its immune system have not been systematically studied. We collected blood and milk samples from nine free-ranging mother-pup pairs throughout the l...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Animal Cognition
سال: 2020
ISSN: 1435-9448,1435-9456
DOI: 10.1007/s10071-020-01390-3